Terrorists at Al-Qaeda have started using strongest encryption techniques in order to bypass the standard cryptographic protections in its various communications. The U.S. Government warned that NSA surveillance revelations will make harder to track bad guys trying to harm the United States, as disclosures can be helpful to terrorist groups. The analysis carried out by the intelligence firm revealed that the Infamous Terrorist Organizations,that attacked civilian and military targets in various countries, has switched to new encryption software for the first time in seven years.
Source: https://thehackernews.com/2014/05/al-qaeda-encryption-tool.html